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I have a working model that I can fit to my data. However, out of my 22 fit parameters, there is one that makes the fit break down when I thaw it. I've attached a working code example below.
The pa…
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- [x] Compare accuracy with Mandel & Agol computation.
- [x] Compare accuracy and speed with Gimenez' code.
- [x] Compare accuracy and speed with Kreidberg's quadratic limb-darkening (both unbinned,…
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Hello all,
I started doing easy least squares fitting using the Levenberg-Marquandt optimizer and I am using my custom user models. I was following the example in the [documentation](https://sherpa…
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sum of coeffs for linear, power, logarithmic < 1
each coeffs should be positive
etc
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I finished coding up and benchmarking the `limbdark` equations in `starry` on the [limbdark branch](https://github.com/rodluger/starry/tree/limbdark). I'm finding several issues with the `julia` imple…
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Hey Nestor,
In certain cases I'm getting an error in get_rmax(). It looks like the indices for `r_maxes` and `m_maxes` go out of bounds, making empty arrays, which later causes `si.UnivariateSpline(…
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This is easy. Figure out the general expression for the nth order limb darkening coefficient in terms of the spherical harmonic coefficients and allow users to provide an array of mu coefficients when…
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I was trying to compare BATMAN to KTransit (https://github.com/mrtommyb/ktransit) for both uniform and quadratic limb darkening, when I realized that BATMAN with quadratic LD assumes that the delta-Fl…
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There doesn't seem to be a standard way to easily treat wavelength-dependent limb darkening. The Claret models provide tabulated coefficients for the intensity variation over the surface of the star i…
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The limb darkening coefficients for models in the grid change with the wavelength interval. Instead, if the stellar model is interpolated in the grid (stellar parameter off the grid), the coefficients…